Welt-seam-trim ming machine



I (No Model.) 2 sheetS sn-eet 1.

Z. T. FRENCH & W. O. MEYER. WELT SEAM TRIMMING MACHINE No. 590,831.Patented Sept. 28,1897.

rotors Witnesses ln/ve m (No Model.) 2 Sheets8heet 2.

z. T. FRENCH 81W. 0. MEYER.

WELT SEAM TRIMMING MACHINE.

No. 590,831. Patented Sept. 28,1897.

n PEIERS o0, PHOTO-LING. WASHINGTON, n c.

UNITED STATES PATENT OFFICE.

ZAOI-IARY -T. FRENCH AND YVILLIAM O. MEYER, OF BOSTON, MASSACHUSETTS.

WELT-SEAM-TRIMMING MACHINE.

SPECIFICATION forming part of Letters Patent No. 590,831, datedSeptember 28, 1897.

Application filed May 27, 1896. Serial No. 593,244. (No model.)

T0 aZZ whom it may concern.-

Machines, of which the following description,

in connection with the accompanying drawin gs, is a specification, likeletters and figures on the drawings representing like parts.

In United States Letters Patent No. 558,379, dated April 14., 1896, awelt-seam-trimming machine is shown wherein'a crown-knife is employed asthe welt-seam-trimming knife, it having a flaring flange sharpened atthe edge. For the production of good work this knife should at all timesbe very sharp, and hence a grinding-wheel was provided adapted to bemoved into and out of engagement or contact with saidknife wheneverdesired. In practice, however, we find that to operate such agrinding-wheel requires considerable attention and consumes considerabletime, and, furthermore, cannot be operated while the welt-s'eamis beingtrimmed for the reason that the operator is holding the work with bothhands. Therefore it is necessary to provide means whereby thegrinding-wheel and trimming-knife may be repeatedly brought intoengagement while the' machine is in operation, and, if desired, whilethe knife is operating to trim the welt-seam, the intervals of timeduring which said parts are in engagement being quite short-'as, forinstance, we may repeatedly move the grinding 'wheel into engagementwith the knife.

Our invention therefore has for one of its objects to improve theconstruction of the means employed for thus repeatedly moving thegrinding-wheel into engagement with the knife.

A crown-knife is arranged to work across the space formed between tworests, and the work is held pressed against said rests with thewelt-seam between them; and another object of this invention is to makethe lowerknife embodying our invention; and Fig. 2, a right-hand sideview of the lower part of the machine shown in Fig. 1, showing in endelevation said grinding mechanism and worksupport or rest.

The main framework comprises, essentially, a base A, mounted upon acolumn A, and side pieces B, erected upon said base.

A crown-knife a having a tapering flange sharpened at the edge andsecured toa sleeve 66 or otherwise supported and driven by any suitablemeans, are all as in the Letters Patent aforesaid, to which referencemay be had, and so also in said patent will be found the upperwork-support c, which is adapted to enter the crease, and the feedingmechanism for i the work.

The work-support or rest ris located a short distance below thework-support c, and when the work is in position it will be seen thatthe welt-seam enters the space between said worksupports or rests o andr,- and the knife enters and works across the space between saidwork-supports in trimming thewelt-seam.

The Work-support or restr is formed with a dovetailed projection 0",which enters a correspondingly-shaped groove formed in the under side ofa block W, said block having upon its rear side a dovetailed projectionr which enters a correspondingly-shaped groove in the block a on theshaft a A set-screw r passes up through the part 9", and anotherset-screw r passes in through the part T and when said set-screws areloosened the part 7" may be moved in and out with relation to the knifeand thepart "r may be moved up and down.

In either case the work-support or rest 1 is adjusted with relation tothe rest a, so that the angle of the work is changed.

The grinding mechanism or attachment consists of a grinding-wheel it,held securely by- A frame 20 has two ears a a each formed with ahorizontal hole through it, and a rod or bar, as n passes through thehole in each ear a and by means of a set-screw is fixedly held in place,said rods or bars 11 projecting in opposite ways from said ears n at orabout equal distances and adapted to enter the holes in the end blocks na serving as bearings on which said end blocks and parts connectedthereto are free to slide back and forth.

The grinding-wheel n is located beneath the crown-knife a and is movedback and forth with the shaft n from one to the other side of saidknife, engaging the beveled edge thereof as it passes in each direction,thereby repeatedly contacting with or engaging it.

The frame 20 is provided with ears a n there being two pairs of cars,one pair at each side of the frame, and said ears are bored furnishes abearing for a hand-screw n which passes up through it and thence upthrough an ear n also pro ecting from the clamp-like ring if, so that byturning said v hand-screw a said frame 20 and parts carried by it may bevertically adjusted.

The shaft or, carrying the grinding-wheel a, has secured to it abelt-pulley 11 by means of which it is continuously rotated as ittravels back and forth across the bevel-ed As a face or edge of therotating knife a means for thus moving the shaft 72' back and forth wehave herein formed on or secured to said shaft n a worm a, (see dottedlines, Fig. 1,) which engages a worm-wheel a, secured to a shaft 91mounted in suitable bearings in a part of the frame connected with oneof the end blocks, and to one side or face of said worm-wheel n acrank-pin 91- (see dotted lines) is secured, upon or to which a link a"is loosely connected, the oppositeend of said link being loosely orpivotally con- 1 nected with the frame 20 or other-fixed point,

and as the shaft n is revolved by the belt- 1 pulley n the worm n willbe correspondingly rotated, driving the worm-wheel a,

and by means of its crankeonnection with the frame the shaft n and partsconnected therewith will be moved back and forth or reciprocatedlongitudinally. Thus it will be seen that both the trimming-knife andgrindingwheel are continuously rotated and that one o of said parts isrepeatedly moved into and out of engagement with the other-ms, forinstance, the gri'nding-wheelis moved back and forth across the edge ofor into and out of engagement with the knife. Furthermore,

it will be seen that as means are provided for moving thegrinding-wheel, as shown, little or no attention on the part of theoperator is required and that the grinding-wheel will be kept inengagement with the knife but for short intervals of time.

lVe claim- 1. In a welt-seam-trimming machine, a grinding-wheel, itsshaft, asupporting-frame for said shaft having a bearing in which it isfree to rotate, a frame constructed and arranged to receive and supportsaid shaft-supporting frame having rods upon which said shaft-supportingframe is free to slide in the direction of the length of the shaft,means for rotating said shaft, and means for moving its supp0rting-frameback and forth, to thereby rotate the grinding-wheel and cause it toautomatically travel back and forth across the beveled cutting edge ofthe trimmingknife, substantially as described.

2. I11 a welt-seam-t-rimming machine, a grinding-wheel, itslshaft, asupporting-frame for said shaft having a bearing in which it is free torotate, a frame constructed and arranged to receive and support saidshaft-supporting frame having rods upon which said shaftsupportin gframe is free to slide in the direction of the length of the shaft,means for verticallyadj usting said frame, means for rotating saidshaft, and means for moving its supporting-frame back and forth, tothereby rotate the grinding-wheel and cause it to automatically travelback and forth across the beveled cutting edge of the trimmingknife,

, substantially as described.

In a welt-seam-trimming machine, a grinding-wheel, its shaft,asupporting-frame for-said shaft having horizontal holes through it, .aframe having horizontal rods upon which said shaft-supportin g frameslides, a belt-pulley n fixed to saidshaft, a worm a, formed on orsecured to said shaft, worm-wheel n bearings therefor attached to theshaft-sup porting frame, a crank-pin on said wormwheel,a link a",connected at one end with said crank-pin and at the other end with afixed point, whereby said grinding-wheel is rotated and moved back andforth beneath and across the beveled cutting edge of the trimming-knife,substantially as described.

4:. In a welt-seam trimming machine, a grinding-wheel, its shaft,asupportingframe for said shaft having a bearing in which it is free torotate, a frame constructed and arranged to receive 'andsupport saidshaft-supporting frame having rods upon which said shaft-supportingframe is free to slide in the direction of the length of the shaft, aclamplike ring embracing the column of the machine, having vertical rodsupon which said frame is verticallyadjustable, means for rotatingsaidsha'ft, and means for moving'its supporting-frame back and forth,.to thereby rotate the grindingwheel and cause it to antomaticallytravel back and forth across the beveled cutting edge of thetrimming-knife, substantially as described.

5. In a welt-seam -trimming machine, a crown-knife having a flaringflange and two work-supports as c and 9, located a short distance apartto receive the Welt-seam between 5 them, said knife working in andacross said space, the work-support 1" being located in front of saidknife and made adjustable in and out, substantially'as described.

6. In a welt-seam-trirnining machine, a

IO crown-knife, having a flaring flange and two work-supports as c andr,located a short distance apart to receive a welt-seam between theWork-support rbeing adjustable in a vertical line toward and from thework-support c, substantially as described. In testimony whereof we havesigned our names to this specification in the presence of twosubscribing Witnesses.

ZACI-IARY T. FRENCH. WILLIAM C. MEYER.

Witnesses: 1

F. H. DAVIS, 13. J. NoYEs.

them, said knife working across said space, I

